Pysam - python module for read and manipulating sam files

Pysam is a python module for reading and manipulating Samfiles. It's a lightweight wrapper of the samtools C-API. 

Looks promising! but failed at compile as I as missing a module on CentOS 5.4

python setup.py build
Traceback (most recent call last):
  File "setup.py", line 9, in ?
    import os, sys, glob, shutil, hashlib
ImportError: No module named hashlib

To be continued....